A magnificent winding road through a steep valley, with deep natural caverns at the bottom

Semi-precious Blue John stones have been mined in this cavern system for centuries.

As part of a larger public art project, three pillars honor the past of Wincobank.

Long-secret natural history museum, featuring the skull of a "Terror Bird."

The view from this giant Stone Age toad is unexpectedly beautiful.

A brick foundation and piles of listing building materials are all that remains of this World War II POW camp.

One of the last doorless, continuously moving elevators still in use in the U.K.

Cemetery established by the Victorians as a solution to the overflowing graveyards.

The whimsical steel spider lurking in the shadows of this suspension bridge shows that engineers can have a sense of humor.

In England, an 18th-century water-powered workshop still stands.

In the ancient Woolley Woods, an art project promises access to new worlds.

A mechanized clock where a man fights off a dragon, crab, and rooster.

A museum of carnival attractions where you are invited to ride the rides.

A haunting collection of the vanished and disappearing natural world.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

Abandoned railway line circling the city of Paris.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

A charming flea market shop dedicated to retrofuturistic apparati.

Dolls of all shapes and sizes display the eras of femininity in this spooky and beautiful collection.

Inside a former cabaret, seven floors of erotic art.

The largest medical and anatomical collection in France lies hidden from the public.

The storefront of a ramshackle Parisian puppet theater.

Dedicated to the history and culture of smoking, this small museum now includes a vape lounge.

Collection of antique taxidermy and natural specimens, near one of Paris's oldest flea markets.